@article{10_2140_agt_2014_14_407,
     author = {Wen, Haomin},
     title = {Lipschitz minimality of the multiplication maps of unit complex, quaternion and octonion numbers},
     journal = {Algebraic and Geometric Topology},
     pages = {407--420},
     year = {2014},
     volume = {14},
     number = {1},
     doi = {10.2140/agt.2014.14.407},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2014.14.407/}
}